Log turner and loader



Patented lan. I7, |899.

T.I S. WILKIN. LUG TURNER AND LOADER. (Application led Apr.- 9, 1.898.)

2 Sheets-Sheet I.

(No Model.)

Patented Jan. I7, |899.

T. s. wlLKlN.

LOG TURNER `AND LOADER.

(Application file d Apr. 9, 189,8.)

2 Sheets-Sheet 2.

(No Model.)

THEODORE S. IVILKIN, OF BROOKVILLE, PENNSYLVANIA.

LOG TURNER AND LOADER.

SPECIFICATION forming part of. Letters Patent No. 617,846, dated January17, 1899.

Application tiled April 9, 1898. Serial No. 677,077. (No model.)

To all whom, t may concern:

Be it known that I, THEODORE S. IVILKIN,

to secure the desired cant or rake thereof, and

to other benefits incidental to these chief purposes.

The invention consists of the mechanism, its parts and combinations ofparts, as hereinafter described and claimed, or their equivalents.

In the drawings, Figure 1 is an elevation of my improved log turner andloader. Fig. 2 is an edge elevation of the nigger or toothed bar. Fig. 3shows a modified form of the invention. Fig. 4. is an edge view of thenigger or toothed bar in the modified form shown in Fig. 3.

My improved log-turner is commonly used in connection with a sawmill,and for the purpose of illustrating its connection therewith and forproviding means for the support of the log-turner I have shown afragment of the framing of a mill, consisting of a bottom sill A, postsB B, a Hoor-sill C, and a logway D. Also in connection therewith I haveshown and indicated a log-carriage E, that travels alongside of the endof the logway D and is provided with a head-block F, the upper surfaceof which is flush with the upper surface of the logway D adjacentthereto.

The nigger or toothed bar 5 is advisably constructed of two oppositerails that are secured together by bolts or rivets through them andthrough interposed blocks G, located in the upper portion of the niggerat equal distances apart, and a number of swinging teeth 7, locatedbetween the rails of the toothed bar in its upper portion and severallybetween blocks (5 6, the teeth being so mounted in the bar as to becapable of being swung upwardly entirely within the space between thetwo rails of the bar in the manner shown in Fig. l and so as whenreleased from this position to swing by gravity into a substantiallyhorizontal position, in which position thefree ends of the teeth projectlaterally in front of the rails of the bar. The toothed bar is alsopreferably provided with an ant-ifriction-roller 8 at its upperextremity and is pivoted at its lower end to a piston-stem 9, whichstemv is provided with a piston reciprocable in the cylinder 10. Thetoothed bar is disposed normally in a vertical position and in the lineof the projection of the piston-stem 9, working in the vertical cylinderl0. The toothed bar is intended and adapted for work in a substantiallyvertical direction, though it is adapted to be tilted rearwardly toalimited extent, whereby movement is provided for in a slightly-obliquedirection.

The nigger or toothedbar 5 is supported movably in position by anigger-frame 11, which is preferably so constructed as to form ways,substantially a casing'for the bar 5, in which it is adapted toreciprocate longitudinally. This casing 12 is preferably so constructedas to have front and rear walls closely adjacent to the front and rearedges of the ni gger,so that as the nigger is projected above the casingthe teeth 7 will fall by gravity and assume a horizontal position,projecting partially beyond the front edge of the bar, and when thenigger is withdrawn downwardly into the casing 12 the teeth will bycontact with the casing be thrown up and rearwardly between the rails ofthe toothed bar in the manner shown in Fig. 1. The casing 12 projectsupwardly to j ust below the surface of the logway D and is preferablyprovided with a suitable number of antifriction bearing-rolls 13 13 atthe front and rear thereof to receive thereagainst the bearing of theedges of the toothed bar 5.

The casing 12 is a part of the nigger-frame 11, which frame is pivotedat 20 and supported tiltably, conveniently on an adjacent post B of themill-frame. The frame 11 is provided with a laterally-projecting arm 14,which is connected by a rod 15 to a piston 1G, reciprocable in thecylinder 17. The piston 16 is provided with an elongated tubular stemIOO 16', which reciprocates steam-tight through the head of the cylinder17, and the connecting-rod 15 extends through the tubular or hollowpiston-stem 1G' and is pivotcd directly to the piston at the bottom ofthe stem, whereby the required amount of lateral movement of theconnecting-rod 15 is provided for within the longitudinal space that canbe readily provided for this cylinder, its piston, and theconnectingrod. As the work of the cylinder 17 is merely that of tiltingthe nigger, its capacity may be comparatively small, as indicated in thedrawings. It is conveniently supported on a post B in any suitablemanner.

A guideway 1S in the framing of the mill supports movably the upperportion of the case 12, but permits of a limited movement thereof to therear of the position shown in Fig. 1. As the nigger is adapted to betilted rearwardly at its upper end, producing a corresponding forwardtilting of the lower end of the bar 5, the cylinder 10 is so mounted asto be capable of oscillation, and this is advisably accomplished bysupporting it on trunnions or a pivotal support 19, as shown in Fig. 1.The cylinders are adapted for the use therein of steam or other liuidmedium for actuating the pistons.

In the modified form of the log-turner shown in Figs. 3 and 4 thetoothed bar 5' is connected to and operated by a lifting-rod 21, that ispivotcd to the toothed bar at its upper extremity and to a head-block22, mounted on the upper end of a piston-stem 9', the piston-stein beingprovided with a piston (not shown) that reciprocates in the cylinder10'. The head-block 22 is fitted and travels on iixed guide-rods 23 23.The cylinder 10' and the guide-rods 23 23 are disposed in an obliquedirection that intersects the axis of the toothed baror the prolongationthereof in the direction of and substantially at the point of theconnection therewith ofthe lifting-rod 21,

so that the lift on the toothed bar is exerted in a directionsubstantially in the line ofthe axis of the cylinder 10'. In this formof con struction the nigger-frame 11' is pivotcd to the cylinder 1 0',and its arm 14' is connected to and actuated by the piston-stem 15',that is provided with a piston reciprocating in the cylinder 17', whichin this instance is trunnioned or pivotcd at 24: on the framing of themill. The construction -of the toothed bar and its support and movementin the casing 12 is substantially the same as in the form shown in Figs.1 and 2, though the bearingrolls 13 are omitted in the drawings in thiscase, as they are not necessary to an operative mechanism.

Vhat I claim as my invention is- 1. In a log-turner, the combination, ofa medium-containing cylinder, a reciprocable tooth-bar or nigger, meansconnected to the tooth-bar adapted to be actuated by the medium in saidcylinder to push the tooth-bar outwardly, a nigger-frame pivotcd to afixed support and having a swinging capability independent of saidcylinder, and means for tilting the nigger-frame.

2. In a log-turner, the combination with a medium-containing cylinder, apiston provided with a stem reciprocable in said cylinder, and areciprocable tooth-bar or nigger pivotcd to said piston-stem, of aswinging nigger-frame tiltable independently of any movement of saidcylinder, another mediumcontaining cylinder, and a piston thereinconnected to said swinging frame and adapted to tilt it independently ofsaid first-mentioned cylinder.

In testimony whereof I aiiix my signature in presence of two Witnesses.

THEODORE S. VILKIN.

Titnessesz BEN M. CLARK, CYRUs II. BLOOD.

